the volume of most substances increases as the temperature increases however the temperature or volume will not alter the substance's mass.
density is the ratio of an objects mass to its volume.
generally, as the temperature increases the density decreases
Sample problem from page 91
Calculating dencity
A copper penny has a mass of 3.1 g and a volume of 0.35 cm^3. What is the density of copper?
1. ANALYZE-list the knowns and unknowns Knowns: mass=3.1 g, volume =0.35 cm^3 Unknown: density =? g/cm^3
Use the known values and the following definition of density. Density= mass/volume 2. CALCULATE-solve for the unknown
substitute the known values and solve for density. Density=mass/volume=3.1g/0.35cm^3=8.8571g/cm^3 3. EVALUATE- Does the result make sense? the answer is yes
Nonmetals are in the upper right hand corner of the periodic table
Density and Temperature
Sample problem from page 91
Calculating dencity
A copper penny has a mass of 3.1 g and a volume of 0.35 cm^3. What is the density of copper?
1. ANALYZE-list the knowns and unknowns
Knowns: mass=3.1 g, volume =0.35 cm^3 Unknown: density =? g/cm^3
Use the known values and the following definition of density. Density= mass/volume
2. CALCULATE-solve for the unknown
substitute the known values and solve for density. Density=mass/volume=3.1g/0.35cm^3=8.8571g/cm^3
3. EVALUATE- Does the result make sense? the answer is yes
Nonmetals are in the upper right hand corner of the periodic table